Valve control and reverse mechanism.



EAPPLIOATION FILED APR.18,1906.

ATENTEE AN; 29, 1907.

UNITED STATES PATENT VALVE CONTROL AND REVERSE MECHANISM.

To all whom it may concern):

Be it known that 1, JOHN W. SLATER, a

' citizenof the United States of America, and

a resident of. Slatersville, in the county of' Providence and State ofRhode Island, have invented certain new and useful Improvements in ValveControl and Reverse Mechanism, of which the following isacspecification.

This invention relates to means for regulating and controlling thedegree of lift of the valves in a gas-engine, together with means for sotiming the actuation of said valves that they will permit the engine torun either in the forward or reverse direction, as desired.

My improvements comprise certain changes.

in construction and arrangement of parts differing from my formerapplication, Serial No. 261,869, (since matured into Patent No. 828,064,dated August7, 1 906.)

In the drawings, Figure 1 is a side elevation of parts embodying myimprovements shown in operative relation with a valve of aninternal-combustion engine. Fig. 2 is a section on the line 2 2 ofFig! 1. Fig. 3 is a similar view to that of Fig. 1, showing theactuating parts elevated by the cam. Fig. 4 is a bottom plan view of.the bipart pivotal link, and Fig. 5 is a sideview of one part of saidpivotal link. A

In said figures, A indicates a broken-away portion of a gas-enginecylinder having a valve-opening, and B indicates a valve seated withinsaid opening and having a spring I) to hold it normally closed. Thevalve stem or rod passes through a guide, as b, which maintains saidstem or rod in a true vertical position. The means provided for liftingthe valve through the medium of its stem or rod comprise a link, whichmay be in two parts C C, pivotally united at c'and having an outercurved surface 0', adapted to form. a

' way or track movable against the end of the valve stem or rod.

The pivot D, uniting the link members, is tearried by a supporting-arm Ewhose opposite end is mounted on a cam-shaft F.

G G indicate, respectively, separate eccentric-stra s mounted uponcircular supports, as g g, w 'ch latter are placed about the camshaft,and'each has a localizing extension .or arm, as 9 that is fulcrumed upona rockshaft 9 which is mounted in a rigid part of the frame. Securedupon the camshaft F within the circular supports 9 g, respec-Specification of Letters Patent.

Application filed April 18. 1906. Serial No. 312,292.

tively, are cams H H, Whose radial enlargements h h, respectively,contact with and are adapted to move against the. inner surfaces of saidcircularsupports. I i

The eccentric-straps I G provided with rods g g, the latter being pinmen -6am. 29, 1907.

Gt are respectivelyoted, respectively, to: lugs 0 0 depending I from thelink members C C, whereby movement communicated through saideccentricstrap rods 9 g rocks said link members 0 C upon their commonpivot D.

Secured against the inner surfaces of the circular sup orts g g are thecam-drops or curved disp acing-blocks k h, respectively, said blocks h hserving to elevate the eccentric-straps and rods through the action ofthe cams in the rotation of the latter.

It will be noted that the blocks h k are so positioned within thecircular supports g as to be in the vertical plane of the va vestem andthe axis of the link members. Thus while the supporting-arm E holds thepivot D, which carries the link members, in a set position beneath thevalve-stem, thereby affording a neutral point at which no movement iscommunicated to the valve with the rotation of the cam-shaft, it isevident that the opposite rocking movement which is communicated to thelink members becomes effective in lifting the valve-stem and valve whenthe link is moved laterally in either direction. It is further evidentthat the degree of lift imparted to the valve varies according to thedegree to which the link is moved and presents its upper surface or waytowardthe valve-stem in different positions having different degrees ofvertical movement.

The means for moving the link to vary its position relatively to thevalve-stem may be as follows'i A lever f is secured to the rockshaft 9to which is also connected a rod or barf, the latter carrying pivotallya rod or bar f that is freely connected to the pivot D. A set of therods or bars f f a is employed for each link, and all are operatedthrough the medium of the single lever f, as is obvious. The modusoperandi with respect to the valve operation to run the engine in theforward or reverse directions and the means employed pression correspondwith the means referred to in'my'said former patent application. Infact, the, main difference existing between said former application andthe present case resides in the arrangement of the present hinged linkto move laterally under a valve rod or stem that is immovable exceptvertically, to actuate the valve difierently, while in the formerapplication the hinged actuator was immovable laterally and the valvepush-rod was movable over the surface of said actuator to accompilsh alike result.

The present device is more particularly adapted for use where a shortvalve stem or rod is used.

I claim J In an internaLcombustion engine having a valve and avalve-stem therefor, a bipart actuator for said stem composed of twohinged members, a cam-shaft having a pair of cams, an actuator-supportpivoted to said camshaft and having a pivot uniting said actuatormembers, a pair .of circular supports about said cams, and havinglocalizing eX- tensions, and a fixed cam-displacing block within eachsupport; together with an eccentrio-strap mounted upon each circularsupport, and a rod extending from each strap, said rods beingrespectively pivoted to the actuator members.

Signed at Kissimmee, Florida, this 13th day of November, 1905.

JOHN W. SLATER.

Witnesses:

J. M; WILLSON, Jr.,

W. B. Hm'ron.

